pm.h

DOS_PCI_DRIVER,DOS环境下运行的PCI驱动程序,个人觉得比较好用.

#ifndef __PM_H__
#define __PM_H__

#include "low.h"
#include "list.h"

#ifdef CONFIG_PM
/*
 * Power management requests
 */
enum
{
	PM_SUSPEND, /* enter D1-D3 */
	PM_RESUME,  /* enter D0 */

	PM_SAVE_STATE,  /* save device's state */

	/* enable wake-on */
	PM_SET_WAKEUP,

	/* bus resource management */
	PM_GET_RESOURCES,
	PM_SET_RESOURCES,

	/* base station management */
	PM_EJECT,
	PM_LOCK,
};

typedef long pm_request_t;

/*
 * Device types
 */
enum
{
	PM_UNKNOWN_DEV = 0, /* generic */
	PM_SYS_DEV,	    /* system device (fan, KB controller, ...) */
	PM_PCI_DEV,	    /* PCI device */
	PM_USB_DEV,	    /* USB device */
	PM_SCSI_DEV,	    /* SCSI device */
	PM_ISA_DEV,	    /* ISA device */
	PM_MTD_DEV,	    /* Memory Technology Device */
};

typedef long pm_dev_t;

/*
 * Device identifier
 */
#define PM_PCI_ID(dev) ((dev)->bus->number << 16 | (dev)->devfn)

/*
 * Request handler callback
 */
struct pm_dev;

typedef long (*pm_callback)(struct pm_dev far * dev,pm_request_t rqst,void *data);

/*
 * Dynamic device information
 */
struct pm_dev
{
	pm_dev_t	 type;
	unsigned long	 id;
	pm_callback	 callback;
	void		*data;

	unsigned long	 flags;
	int		 state;
	int		 prev_state;

	struct list_head entry;
};

extern int pm_active;

#define PM_IS_ACTIVE() (pm_active != 0)

/*
 * Register a device with power management
 */
struct pm_dev far * pm_register(pm_dev_t type,
			   unsigned long id,
			   pm_callback callback);

/*
 * Unregister a device with power management
 */
void pm_unregister(struct pm_dev far * dev);

/*
 * Unregister all devices with matching callback
 */
void pm_unregister_all(pm_callback callback);

/*
 * Send a request to a single device
 */
int pm_send(struct pm_dev far * dev,pm_request_t rqst,void far * data);

/*
 * Send a request to all devices
 */
int pm_send_all(pm_request_t rqst,void far * data);

/*
 * Find a device
 */
struct pm_dev far * pm_find(pm_dev_t type, struct pm_dev far * from);

#else

#define PM_IS_ACTIVE() (0)

#endif

#endif